Rotatory brush or scraper for removing rust, paint, or the like



G. E. SANDBLOM.

ROTATORY BRUSH 0R SCRAPER FOR REMDVING RUSUPMNT, OR'THE LIKE.

nmcmon FILED ux-:c.3. 1920. I

1,414,805. Patented Alprf25,1922.4

e f. neInEeNnrRAiMsANnBLoM, oreorrfrnnnone; SWEDEN.. y Y itoTAToitY/nnusn'on,sCRArEREoR nnilioviitefnusr, rainnlortrim LIKE.. k`

1,414,305.1f/ I, 1 i .Sepedcrifcatlii ffettrs Patent.; 25,*21922."

npplication inea necinbe 3, iszofjsriain. 428,158.

To. all 'whomV t 1 concern:

sidinghat Gottenborg, Sweden, have invented certain newv and yuseful Improvements in fiotatory Brushesor Scrapers for VRemoving ltustyPaint,"V or 'thelike, ofl which the fol-1 lowing' is a specification.

The. present inventionvhasfforsits, object" to provide an improved..rotatory-.fbrushf'orv scraper `forthe class ofworlr mentioned, b'y

which the. disadvantages just mentioned A'are overcome. The invention-isfchiefly character'ized therein, thatthe f operative surfaces of. allthe single bristles orfscrapers arepositionedin practicallyvfa common planefper-v pendicular tdthe aXis of rotation ofthe tool.`

In the accompanying drawing anembodimentfof the invention is illustrateda: Fig. 1V

shows a perspective; view of the improved v toolianjdlfig. 2 partly infsection anxelevation ofthe sametoolon a reduced scale and provided upon adriving shaft with a holder. f

Similar 4letters rrefer,` to Y,correspondingY parts all throughthe drawing.

In the drawing l denotesa circular base lugs and retained lin itsproper position byv means of a headllprovided on one enduof the shaft and a split pin 5 going through the opposite end of the said shaft. Onthe ber as for instance a steel wire, the medial portion of which is wound inthe' shape ofV aspiralcoil 7, surrounding the shaft 3 withr theone end of the, spiral coil extendedl to .form the bristle 6' prop er and the rear end 9 straightened and linserted into ajhole 8 in the base plate l. this manner the coils V7 withthe bristles 6 arejprevented from being rotated about and displaced along-the shaft 3. The bristles 6 are shaped in suoli a way,- that the operative square cut ends.-

lO'of the'bristleslie ina planefwhich is practically Vparallel to the baseplate o r atA right angles to. the Vaxis of rotation vof theV tool, and the intermediate portionV of "each bristle Lbetweenrthe operative end 10 portionv of Vallftlie'bristlesf6'are parallelto 1 and the coil 7 is nearly parallel lto the'baseplate and tangentially to a'circle imagined as drawnv with theycentre on .the axis of 'rotation of the base plate5 whereby said middle f. one' another Be .it known ythat I, GIDEONEFRAIMSAND- BLOM, Aasubjectofthe King ofSweden, re.y

shaft 3 thereis provided a plurality ,of` bristles 6l comprisingeach av yielding mem-V The embodiment described illustrated tobeusedprincipally asabrush.) yIty is' however, .obvious that the relatively the sha-ft S3. 1;

VH-The operativefends 10 ofallfthe'bristles varev positionedE inV practically the same plane as mentionedabove, and the'bristle-endsare somewhat flattened-so as tof'expose a larger width in their moving direction.' l .According toi-Fig@ the plate v -1- by means of a threaded bolt' ll'and nutslQ and 13.is i

attached to lthe end of a shaft -14, provided to be rotated' in. any suitablaway (not projecting at right angles to sh'own)`. On bush-ings or bearingslffpro-vVV vided en the shafty 14 there isfrot'atablyf mounted a socket l6to serve as a' holder for handling'thegtooL-v Y e :f The improved-implement operates l`in ythe followingmann'er:

y The yi001 is heid :bythe lhandit; ic' mi the Vyieflding bristlesl 6 g are'y pressed i againstthe asV nearly las possible* perpendicular to the *said surface. '.'During theroperationfthe opek ,l erative surfaces. 10 fof.4 the .bristles accord-, i f l inglyV describe-circles" upon 'the surface' 17,` and moving theV 4tool in different .direc- '7'5" surface 17- to Vbe cleansed witlijthe-sha'ft 14"` l tionsjeach .particularfspot ofthe saidsurg face'Y will be treatedv :from different`jsdes,`

whereby'thecleaningeffect willbe very tense. As all the bristles6 during the whole work, .always .touchf the f surface"` to bef cleansed, they willnot` be s ubjectedfto-'inevenly-to the surface `17 notwithstandingk lengthofthe single members 6.

1 When the bristleshavebeen-torn so "much-I.

that they cannot 'longerbe used with` adsv vantage the pin 5 lis removed,fand theshaft portions 9 of the newl coils? vinto theholes 8 and thereafterreolacing the shaft through-j I` said coils successively.

and 'shown is;

"j'uous lOl-OWS theupon 'and consequently "il Athe Wea-fend temor. the" bristles will `ten; reduced to'afillinum. 'The yielding effect4 'ofthe bristlesallows thetool to be pressed some slight difference intheshape and thin bristles shown can .-besubstituted'by bristles of alargerwidth andthe. tool thenr with greater?l advantages be employedVT a l 10 portion of each bristle extending at a slight tails of Vmy improved device as shown and described, Which `can be varied Without Vinterfering with the scope of the 'invention.-'

Having thus `described and ascertained myk invention, what IV claim as new and vWant lto secure by Letters Patent is: y

" l. VA rotary tool for removing rust, paint and the like coatings from. structures `00m- Vprising a rotary shaft, and a plurality of metallic bristles mounted on vsaid shaft,v a

,k faces disposed in a v plane perpendicular to the axis of rotation of theV tool, said Wire bristles havingtheir .opposite ends fixed inv relation to thJe rotatory shaft vand their medial portions rigidly Supported so asV to increase the springing effect of said bristles.'

'3. A rotary `tool of the class described comprising a rotary shaft, a plurality of yielding Wirebristleswith squarefcut'opf erative front vend surfaces,l the` rearY ends of the bristles vengaging"-vvith said rotaryV shaft i so `as to hold the bristle'sryieldingly inplplace,

v the middle' portions of'said'lbristles beingAk coiled, and `vmeans to fhold said coiled por-` tions. inV place relativeto the sai'drotary j ff L i V4L. A rotary tool of thecharacterdescrlbed comprising a rotary shaft, a base plate' car-V riedv by said shaft, a second shaft journaled upon-saidfbas'e plate and arranged atfrig'ht :ingles to the rotary shaft, ar pluralityfof Y Wire `bristles having coiled portions embr'ac--V nig the second mentioned shaft,=Vr the opera',-V

tive ends of saidwire bristles being square cut and lyingin a plane perpendicularto,

the axis of rotation .ofthe rotary shaft,"'the oppositek ends of said `Wire bristlesl being fixed to said :base plate, and the portionsof saidfbristle'sV lying'V intermediate the coiled portions andthe operative ends lyingy tangentially with" respectftothe imaginary cirr cular plane concentric vto the axis Vof rotation of thev rotaryshaft andfv'touchingthe plane of the-bristles. f Y

In testimony whereof Lhave -afiixedlny c signature;

` GIDEON EFRIM SANDBILOMti Y 

